Current error message:
perl6 -e 'my @a, @b'
===SORRY!=== Error while compiling -e
Variable '@b' is not declared
at -e:1
------> my @a, ⏏@b
perl6 --version
This is Rakudo version 2016.08.1-59-gec9e814 built on MoarVM version 2016.08-23-gfa9528b
implementing Perl 6.c.
Output is also the same with the 2015.09 release.